I need help with 10 english problems where to add semicolons?

Well, I'm not going to do your homework for you, but I'll be glad to help you learn about semicolons. A semicolon is used to separate two independent clauses that are closely related and therefore can be properly included in the same sentence. You've done #2, #3, #4, #7, #8, #9, and #10 correctly. Look carefully at these and use them as examples to help you figure out the others. Each independent clause could stand alone as a separate sentence; that's your clue as to where to put the semicolon.